fix(apple): Clarify app hang V2 platforms (#15865)

Clarify that app hangs V2 only works for iOS and tvOS.

Author: philipphofmann

docs/platforms/apple/common/configuration/app-hangs.mdx

@@ -134,7 +134,7 @@ SentrySDK.resumeAppHangTracking()
 
 ### App Hangs V2
 
-As of version 8.50.0, you can enable AppHangsV2, which is available on iOS and tvOS. **Starting with version 9.0.0, App Hangs V2 is enabled by default.** The main difference is that AppHangsV2 differentiates between fully-blocking and non-fully-blocking app hangs, which you might choose to ignore, and measures the duration of app hangs. A fully-blocking app hang is when the main thread is stuck completely, and the app can't render a single frame. A non-fully-blocking app hang is when the app appears stuck to the user, but can still render a few frames. Fully-blocking app hangs are more actionable because the stacktrace shows the exact blocking location on the main thread. Non-fully-blocking app hangs can have a stacktrace that doesn't highlight the exact blocking location, since the main thread isn't completely blocked.
+As of version 8.50.0, you can enable AppHangsV2, which is available only on **iOS and tvOS**. **Starting with version 9.0.0, App Hangs V2 is enabled by default.** The main difference is that AppHangsV2 differentiates between fully-blocking and non-fully-blocking app hangs, which you might choose to ignore, and measures the duration of app hangs. A fully-blocking app hang is when the main thread is stuck completely, and the app can't render a single frame. A non-fully-blocking app hang is when the app appears stuck to the user, but can still render a few frames. Fully-blocking app hangs are more actionable because the stacktrace shows the exact blocking location on the main thread. Non-fully-blocking app hangs can have a stacktrace that doesn't highlight the exact blocking location, since the main thread isn't completely blocked.
 
 The SDK sets the `exception.type` to `App Hang Fully Blocked` or `App Hang Non Fully Blocked`, so you can filter for App Hangs via `error.type` in Sentry.
 

docs/platforms/apple/common/migration/index.mdx

@@ -32,7 +32,7 @@ We now enabled the following features by default:
 
 - **Performance V2 is enabled by default**: The app start duration now finishes when the first frame is drawn instead of when the OS posts the `UIWindowDidBecomeVisibleNotification`. We removed the `enablePerformanceV2` option.
 - **Pre-warmed app start tracking**: The SDK now collects pre-warmed app starts by default via `enablePreWarmedAppStartTracing`.
-- <PlatformLink to="/configuration/app-hangs/#app-hangs-v2">App hang tracking V2</PlatformLink>: This is now the default and we removed the option to enable/disable it.
+- <PlatformLink to="/configuration/app-hangs/#app-hangs-v2">App hang tracking V2</PlatformLink>: This is now the default only on **iOS and **tvOS** and we removed the option to enable/disable it. macOS still uses V1.
 
 ### Disable App Hang Tracking for Extensions